#include <stdio.h>

int main(){
    int year,leap;
    scanf("%d",&year);
    if(year%4==0){
        if(year%100==0){
            if(year%400==0){
                leap=1;
            } else {
                leap=0;
            }
        } else{
            leap=1;
        }
    } else{
        leap=0;
    }
    if(leap!=0){
        printf("%d is",year);
    } else{
        printf("%d is not",year);
    }
    return 0;
}